28018727831 has 2 divisors, whose sum is σ = 28018727832. Its totient is φ = 28018727830.

The previous prime is 28018727819. The next prime is 28018727851. The reversal of 28018727831 is 13872781082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28018727831 - 2²⁶ = 27951618967 is a prime.

It is a super-2 number, since 2×28018727831² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28018727851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14009363915 + 14009363916.

It is an arithmetic number, because the mean of its divisors is an integer number (14009363916).

Almost surely, 2^28018727831 is an apocalyptic number.

28018727831 is a deficient number, since it is larger than the sum of its proper divisors (1).

28018727831 is an equidigital number, since it uses as much as digits as its factorization.

28018727831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 301056, while the sum is 47.

The spelling of 28018727831 in words is "twenty-eight billion, eighteen million, seven hundred twenty-seven thousand, eight hundred thirty-one".